arXiv subjects

Chung Kao

Publications and source records attributed to Chung Kao.

58 records · Page 4Linked to original sources

arXiv1994

Production of CP-Odd Higgs Bosons with Large Transverse Momentum at Hadron Supercolliders

A two Higgs doublet model is employed to study the production of a CP-odd Higgs boson ($A$) associated with a large transverse momentum jet ($j$) at hadron supercolliders. The cross section of $pp \to jA+X$ is evaluated with four subprocesses: $gg \to gA$, $gq \to qA$, $g\bar{q} \to \bar{q}A$ and $q\bar{q} \to gA$. We find that $pp \to jA+X$ is a significant source of CP-odd Higgs bosons at future hadron supercolliders.

hep-ph↗

arXiv1993

Production of $Z$ Boson Pairs at Photon Linear Colliders

The $ZZ$ pair production rate in high energy $γγ$ collisions is evaluated with photons from laser backscattering. We find that searching for the Standard Model Higgs boson with a mass up to, or slightly larger than, 400 GeV via the $ZZ$ final state is possible via photon fusion with backscattered laser photons at a linear $e^+e^-$ collider with energies in the range 600 GeV $< \sqrt{s_{e^+e^-}} <$ 1000 GeV.

hep-ph↗

arXiv1993

Aspects of Chargino-Neutralino Production at the Tevatron Collider

We have used ISAJET 7.0/ISASUSY 1.0 to evaluate the rates and study distributions for trilepton events from the leptonic decays of charginos and neutralinos produced at the Fermilab Tevatron via the reaction, $p\bar p\rightarrow \tilde{W_1} \tilde{Z_2}$ + X for cuts inspired by the CDF and D0 experiments. We find that about 60\% of these events do not contain any jets, and so should be easily identifiable over Standard Model backgrounds from $t\bar{t}$ and WZ production, provided that the decay $\tilde{Z_2}\rightarrow\tilde{Z_1}Z$ is kinematically inaccessible. We further show that, with suitable cuts, these backgrounds can be reduced to less than 1-2 $fb$ even if $n_{jet} = 1$, effectively increasing the SUSY sample by 50\%. We confirm that the signal is only rate-limited, and that the Fermilab Tevatron after an accumulation of 100 $pb^{-1}$ of integrated luminosity will be able to explore parameters well beyond the range of LEP and, if sleptons are substantially lighter than squarks, close to the reach of LEP 200.

hep-ph↗

arXiv1992

A Z' Model Which May Be Relevant to the New LEP Events

A multi-Higgs model with an extra neutral gauge boson ($Z'$) is introduced. One scalar Higgs boson ($H_2$) in this model decays dominantly into a photon pair. The $Z'$ decay to $μ^+μ^-$ gets a much larger branching ratio than the $Z$ decay to this channel. The $Z Z' H_2$ vertex provides a final state from $Z$ decay resembling the new $l^+l^-γγ$ events at the LEP. Other promising phenomenology, such as $Z \rightarrow l\bar l Z'$ is also discussed.

hep-ph↗